From 1ff3793322585443909d11284457811c461f8de4 Mon Sep 17 00:00:00 2001
From: Takamichi Horikawa <takamichiho@gmail.com>
Date: Thu, 14 Sep 2017 18:57:05 +0900
Subject: pacc: add viewport

---
 pacc/pacc-gl-procs.inc | 1 +
 pacc/pacc-gl.c         | 5 +++++
 pacc/pacc.h            | 1 +
 3 files changed, 7 insertions(+)

(limited to 'pacc')

diff --git a/pacc/pacc-gl-procs.inc b/pacc/pacc-gl-procs.inc
index cd991e0..1984273 100644
--- a/pacc/pacc-gl-procs.inc
+++ b/pacc/pacc-gl-procs.inc
@@ -9,6 +9,7 @@ PROC(GENTEXTURES, GenTextures)
 PROC(TEXPARAMETERI, TexParameteri)
 PROC(PIXELSTOREI, PixelStorei)
 PROC(DRAWARRAYS, DrawArrays)
+PROC(VIEWPORT, Viewport)
 #endif // PROC_NO_GL_1_1
 PROC(ACTIVETEXTURE, ActiveTexture)
 #endif // PROC_NO_GL_1_3
diff --git a/pacc/pacc-gl.c b/pacc/pacc-gl.c
index e1463b8..ada045e 100644
--- a/pacc/pacc-gl.c
+++ b/pacc/pacc-gl.c
@@ -468,6 +468,10 @@ err:
   return 0;
 }
 
+static void pacc_viewport_scale(struct pacc_ctx *pc, int scale) {
+  glViewport(0, 0, pc->w*scale, pc->h*scale);
+}
+
 static struct pacc_vtable pacc_gl_vtable = {
   .pacc_delete = pacc_delete,
   .gen_buf = pacc_gen_buf,
@@ -485,6 +489,7 @@ static struct pacc_vtable pacc_gl_vtable = {
   .color = pacc_color,
   .begin_clear = pacc_begin_clear,
   .draw = pacc_draw,
+  .viewport_scale = pacc_viewport_scale,
 };
 
 struct pacc_ctx *pacc_init_gl(int w, int h, struct pacc_vtable *vt) {
diff --git a/pacc/pacc.h b/pacc/pacc.h
index b3387ac..30e7ab2 100644
--- a/pacc/pacc.h
+++ b/pacc/pacc.h
@@ -46,6 +46,7 @@ struct pacc_vtable {
   void (*color)(struct pacc_ctx *ctx, uint8_t pal);
   void (*begin_clear)(struct pacc_ctx *ctx);
   void (*draw)(struct pacc_ctx *ctx, struct pacc_buf *buf, enum pacc_mode mode);
+  void (*viewport_scale)(struct pacc_ctx *ctx, int scale);
 };
 
 struct pacc_ctx *pacc_init_gl(int w, int h, struct pacc_vtable *vt);
-- 
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